MINDEN, Neb. (AP) - The city council has defined what it means to be a "pit bull" in Minden.

City clerk and treasurer Dick Young said Thursday that an earlier city ordinance had banned dogs with some pit bull in their family backgrounds. But he says it was tough to determine the exact percentage in a particular dog.

The new ordinance defines pit bulls as any of the dogs "commonly referred to" as pit bull dog, the American pit bull terrier and American Staffordshire terrier.

Young also says visitors can bring their pit bulls to town but for only a maximum of 7 days. And the dogs must be leashed.

The ordinance goes into effect next week.

In June, the city of Osceola banned pit bulls along with seven other breeds.